PARIS: Iran's supreme leader Ali Khamenei on Saturday said authorities "must break the back of the seditionists," blaming the US for "casualties" after a crackdown on protests against the country's clerical leadership. Authorities have said demonstrations they condemn as "riots" are under control, with state-aligned media reporting thousands of arrests and officials vowing swift punishment for those detained.

The country's supreme leader says foreign-backed protests 'caused massive damage and killed several thousands'.

Ayatollah Ali Khamenei claims the US instigated recent unrest in which thousands have been killed.